test/jdk/java/awt/FontClass/FontTransformAttributeTest.java

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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.font.TextAttribute;
import java.awt.font.TransformAttribute;
import java.awt.geom.AffineTransform;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;

import javax.swing.JPanel;

/*
 * @test
 * @bug 4650042
 * @summary Draw text using a transform to simulate superscript, it should look like a superscript
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual FontTransformAttributeTest
 */

public class FontTransformAttributeTest extends JPanel {
    AttributedCharacterIterator iter;

    public static void main(String[] args) throws Exception {
        final String INSTRUCTIONS = """
                This test should display a string ending with the superscripted number '11'.
                Pass the test if you see the superscript.""";

        PassFailJFrame.builder()
                .title("FontTransformAttributeTest Instruction")
                .instructions(INSTRUCTIONS)
                .columns(35)
                .splitUI(FontTransformAttributeTest::new)
                .build()
                .awaitAndCheck();
    }

    FontTransformAttributeTest() {
        AffineTransform superTransform = AffineTransform.getScaleInstance(0.65, 0.65);
        superTransform.translate(0, -7);
        TransformAttribute superAttribute = new TransformAttribute(superTransform);
        String s = "a big number 7 11";
        AttributedString as = new AttributedString(s);
        as.addAttribute(TextAttribute.TRANSFORM, superAttribute, 15, 17);
        iter = as.getIterator();
        setBackground(Color.WHITE);
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200, 100);
    }

    @Override
    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        Dimension d = getSize();
        g2.drawString(iter, 20, d.height / 2 + 8);
    }
}